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Mr. Robert H Duff, NP

Geriatric Medicine (Family Medicine) Physician in Sierra Vista, AZ · enumerated 2007 · practices at Valley Vista Medical Center.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1801089255

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Registry record

Entity type Individual (Type 1)
Name Mr. Robert H Duff
Credential NP
Sex Male
Practice address 157 N Coronado Dr, Ste B, Sierra Vista, AZ, 85635
Phone (520) 629-4802
Enumeration date Aug 20, 2007
Last updated in NPPES Jun 14, 2023

Taxonomy & licenses

207QG0300X Geriatric Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 244633 (AZ) Primary
363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 5136530-4405 (UT) Secondary
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License NP-828A (ID) Secondary
NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where does Robert Duff practice?
The practice location on file with NPPES is in Sierra Vista, AZ. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Robert Duff?
The National Provider Identifier (NPI) for Robert Duff is 1801089255, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-06-14.